What caused this colour issue?

Last week I printed this model using a .2mm nozzle and trimmed down the purge to 150 for all colours due to higher values causing issues with purge clogs.

The yellow colour appears to have bled into the white, I could understand under purging if the colour bleed diminished during the printing of the layer but the discolouration remains constant throughout the whole layer and the internal supports. Also it only affects the yellow to white transition.

I will attempt to print again when I have some ideas but as this is a 40 hour print I would like some guidance as to possible solutions.





The 0.2mm nozzle uses much less material per layer, so discoloration can occur due to insufficient flushing volume Yllw–>Wht. When printing small multicolor stuff, it is better to also print a flush object rather than flushing into your main objects infill to save couple grams of filament and end up wasing day(s) of print time